I've been on this for awhile and i have no clue what the answers are. i only knew some as you can see

Aspecial electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. the sensor measures the magnitude of the normal force that the seat exerts on a rider. the loop-the-loop ride is in the vertical plane and its radius is 23 m. sitting on the seat before the ride starts, a rider is level and stationary, and the electronic sensor reads 740 n. at the top of the loop, the rider is upside down and moving, and the sensor reads 370 n. what is the speed of the rider at the top of the loop?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?